Author: William D. Templin
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 39
Book Description
This report describes the preparation of a comprehensive genetic baseline representing Chinook salmon populations across the Gulf of Alaska and south to California, and the use of this baseline to estimate the relative stock composition of Chinook salmon harvests in the Copper River District commercial fishery from 2005 to 2008.
Genetic Stock Identification of Copper River Chinook Salmon Harvest, 2005-2008
Author: William D. Templin
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 39
Book Description
This report describes the preparation of a comprehensive genetic baseline representing Chinook salmon populations across the Gulf of Alaska and south to California, and the use of this baseline to estimate the relative stock composition of Chinook salmon harvests in the Copper River District commercial fishery from 2005 to 2008.
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 39
Book Description
This report describes the preparation of a comprehensive genetic baseline representing Chinook salmon populations across the Gulf of Alaska and south to California, and the use of this baseline to estimate the relative stock composition of Chinook salmon harvests in the Copper River District commercial fishery from 2005 to 2008.
Genetic Stock Composition of the Commercial Harvest of Chinook Salmon in Copper River District, 2013-2017
Author: Sara Ellen Gilk
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 50
Book Description
Chinook salmon are harvested in subsistence, commercial, sport, and personal use fisheries throughout the Copper River drainage and in nearshore marine waters. This project was designed to estimate the stock-specific harvest of Chinook salmon in the Copper River District commercial drift gillnet fishery using genetics samples from 2013 through 2017. The Chinook Salmon Research Initiative identified the Copper River as 1 of 12 indicator stocks representing the diverse life history and migratory characteristics of Alaska Chinook salmon. Adult abundance information was identified as a fundamental knowledge gap, including the absence of programs to estimate stock-specific harvest in mixed stock commercial fisheries. This project applied the available baseline of genetic information representing Chinook salmon populations from within the Copper River drainage, around the Gulf of Alaska, and from southern populations to estimate the relative stock compositions of Chinook salmon harvests in the Copper River District commercial fishery. The results show that most of the fish in the Copper River commercial fishery originated from Copper River populations, which is consistent with findings from previous studies. A consistent temporal pattern in the composition of the commercial fishery harvests was observed across the 5-year study. As the season progressed, the proportion of Upper Copper River Chinook salmon decreased, and the proportion of Lower Copper River Chinook salmon increased. The unusually high proportions of nonlocal Chinook salmon in the commercial harvest occurring during 2 of the study years (2014 and 2015) align with other reports of large numbers of out-of-area Chinook salmon in commercial fisheries throughout the southern and southeastern seaboards of Alaska. The results support the historical commercial management approach of providing inriver passage for all temporal components of the run. Genetic data allow for estimating the stock-specific harvests of wild stocks or stocks (with and without coded wire tags) from other areas.
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 50
Book Description
Chinook salmon are harvested in subsistence, commercial, sport, and personal use fisheries throughout the Copper River drainage and in nearshore marine waters. This project was designed to estimate the stock-specific harvest of Chinook salmon in the Copper River District commercial drift gillnet fishery using genetics samples from 2013 through 2017. The Chinook Salmon Research Initiative identified the Copper River as 1 of 12 indicator stocks representing the diverse life history and migratory characteristics of Alaska Chinook salmon. Adult abundance information was identified as a fundamental knowledge gap, including the absence of programs to estimate stock-specific harvest in mixed stock commercial fisheries. This project applied the available baseline of genetic information representing Chinook salmon populations from within the Copper River drainage, around the Gulf of Alaska, and from southern populations to estimate the relative stock compositions of Chinook salmon harvests in the Copper River District commercial fishery. The results show that most of the fish in the Copper River commercial fishery originated from Copper River populations, which is consistent with findings from previous studies. A consistent temporal pattern in the composition of the commercial fishery harvests was observed across the 5-year study. As the season progressed, the proportion of Upper Copper River Chinook salmon decreased, and the proportion of Lower Copper River Chinook salmon increased. The unusually high proportions of nonlocal Chinook salmon in the commercial harvest occurring during 2 of the study years (2014 and 2015) align with other reports of large numbers of out-of-area Chinook salmon in commercial fisheries throughout the southern and southeastern seaboards of Alaska. The results support the historical commercial management approach of providing inriver passage for all temporal components of the run. Genetic data allow for estimating the stock-specific harvests of wild stocks or stocks (with and without coded wire tags) from other areas.
Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2008
Author: Nicholas A. Decovich
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 38
Book Description
Discusses significant genetic variation among populations of Chinook salmon within the Yukon River drainage, which has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 38
Book Description
Discusses significant genetic variation among populations of Chinook salmon within the Yukon River drainage, which has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River, 2006
Author: William D. Templin
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 31
Book Description
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 31
Book Description
Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River in 2004
Genetic Stock Identification of Chinook Salmon Harvests on the Yukon River, 2005
Author: William D. Templin
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 32
Book Description
Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2009
Author: Nicholas A. Decovich
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 33
Book Description
Discusses significant genetic variation among populations of Chinook salmon (Oncorhynchus tshawytscha) within the Yukon River drainage, which has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 33
Book Description
Discusses significant genetic variation among populations of Chinook salmon (Oncorhynchus tshawytscha) within the Yukon River drainage, which has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River, 2007
Author: Nicholas A. Decovich
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 42
Book Description
Discusses significant genetic variation among populations of Chinook salmon within the Yukon River drainage, which has been used to provide estimates of stock composition of fishery harvests since the early 1990s.
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 42
Book Description
Discusses significant genetic variation among populations of Chinook salmon within the Yukon River drainage, which has been used to provide estimates of stock composition of fishery harvests since the early 1990s.
Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2010
Author: Nicholas A. Decovich
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 32
Book Description
Discusses significant genetic variation among populations of Chinook salmon (Oncorhynchus tshawytscha) within the Yukon River drainage; this data has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 32
Book Description
Discusses significant genetic variation among populations of Chinook salmon (Oncorhynchus tshawytscha) within the Yukon River drainage; this data has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Yukon River Chinook Salmon Subsistnce Harvest ASL and Genetic Stock Identification, 2018
Author: Sean D. Larson
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 30
Book Description
Understanding the age, sex, length, and stock of origin of Chinook salmon Oncorhynchus tshawytscha, caught in subsistence fisheries of the Yukon River is important for making well informed management decisions and forecasting salmon runs. The objective of this study was to collect representative genetic mixed stock analysis information, coupled with age, sex, and length data, from the Chinook salmon subsistence harvest in the Coastal District and Districts 1–5. A total of 43 subsistence fishermen from 13 communities sampled 1,573 Chinook salmon that were harvested using gillnets, fish wheels, and dip nets. The age, sex, and length composition of the harvest was 0.3% age-3, 16.9% age-4, 47.1% age-5, 33.9% age-6, 1.8% age-7, 32.5% female, and an average of 725 mm in length. The proportion of the catch that was Canadian-origin ranged from 0.38 in District 2 to 0.72 in District 5. The data generated from this project are essential to estimate total run size of Yukon River Chinook salmon stocks, evaluate boarder passage and harvest share agreements as defined in the Pacific Salmon Treaty, and update spawner-recruit models used to estimate past and future run productivity. Due to the variability in Chinook salmon runs, management actions, and harvest, annual monitoring of the subsistence Chinook salmon harvest is needed.
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 30
Book Description
Understanding the age, sex, length, and stock of origin of Chinook salmon Oncorhynchus tshawytscha, caught in subsistence fisheries of the Yukon River is important for making well informed management decisions and forecasting salmon runs. The objective of this study was to collect representative genetic mixed stock analysis information, coupled with age, sex, and length data, from the Chinook salmon subsistence harvest in the Coastal District and Districts 1–5. A total of 43 subsistence fishermen from 13 communities sampled 1,573 Chinook salmon that were harvested using gillnets, fish wheels, and dip nets. The age, sex, and length composition of the harvest was 0.3% age-3, 16.9% age-4, 47.1% age-5, 33.9% age-6, 1.8% age-7, 32.5% female, and an average of 725 mm in length. The proportion of the catch that was Canadian-origin ranged from 0.38 in District 2 to 0.72 in District 5. The data generated from this project are essential to estimate total run size of Yukon River Chinook salmon stocks, evaluate boarder passage and harvest share agreements as defined in the Pacific Salmon Treaty, and update spawner-recruit models used to estimate past and future run productivity. Due to the variability in Chinook salmon runs, management actions, and harvest, annual monitoring of the subsistence Chinook salmon harvest is needed.